CVE-2019-12107: The upnp_event_prepare function in upnpevents.c in MiniUPnP MiniUPnPd through 2.1 allows a remote attacker to

Q: How do I fix CVE-2019-12107?

miniupnpd: upgrade to newer than 2.1. Exact commands for each OS are on this page.

Q: Is CVE-2019-12107 being exploited?

CVE-2019-12107 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-12107 affect?

CVE-2019-12107 affects miniupnpd. Severity is high (CVSS 7.5). The upnp_event_prepare function in upnpevents.c in MiniUPnP MiniUPnPd through 2.1 allows a remote attacker to leak information from the heap due to improper validation of an snprintf return value.

Q: How urgent is CVE-2019-12107?

Priority 58/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2019-12107 is a high-severity flaw (CVSS 7.5) affecting miniupnpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The upnp_event_prepare function in upnpevents.c in MiniUPnP MiniUPnPd through 2.1 allows a remote attacker to leak information from the heap due to improper validation of an snprintf return value.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.0% (top 12%)
CISA exploited list	No
Weakness	CWE-252
Published	2019-05-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: miniupnp.free

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-05-15 23:29 UTCPublished CVE record published
2026-06-17 02:14 UTCUpdated Record last modified

miniupnp.free miniupnpd UPGRADE

Affected: <= 2.1

Fixed in: newer than 2.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy miniupnpd || rpm -q miniupnpd || miniupnpd --version

2. UPGRADE to newer than 2.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade miniupnpd

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade miniupnpd

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-12107?

miniupnpd: upgrade to newer than 2.1. Exact commands for each OS are on this page.

Is CVE-2019-12107 being exploited?

CVE-2019-12107 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-12107 affect?

CVE-2019-12107 affects miniupnpd. Severity is high (CVSS 7.5). The upnp_event_prepare function in upnpevents.c in MiniUPnP MiniUPnPd through 2.1 allows a remote attacker to leak information from the heap due to improper validation of an snprintf return value.

How urgent is CVE-2019-12107?

Priority 58/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-5720 CRITICAL 9.1 UPGRADE miniupnpd contains an integer underflow vulnerability in SOAPAction header parsing that allows remote attacker
CVE-2019-12111 HIGH 7.5 UPGRADE MITIGATE A Denial Of Service vulnerability in MiniUPnP MiniUPnPd through 2.1 exists due to a NULL pointer dereference i
CVE-2019-12110 HIGH 7.5 UPGRADE An AddPortMapping Denial Of Service vulnerability in MiniUPnP MiniUPnPd through 2.1 exists due to a NULL point
CVE-2019-12109 HIGH 7.5 UPGRADE A Denial Of Service vulnerability in MiniUPnP MiniUPnPd through 2.1 exists due to a NULL pointer dereference i
CVE-2019-12108 HIGH 7.5 UPGRADE A Denial Of Service vulnerability in MiniUPnP MiniUPnPd through 2.1 exists due to a NULL pointer dereference i

References

← Back to latest CVEs